generateChunks

read.js

async function* generateChunks(filePath, size) {
    const sharedBuffer = Buffer.alloc(size);
    const stats = fs.statSync(filePath); // file details
    const fd = fs.openSync(filePath); // file descriptor
    let bytesRead = 0; // how many bytes were read
    let end = size; 
    
    for(let i = 0; i < Math.ceil(stats.size / size); i++) {
        await readBytes(fd, sharedBuffer);
        bytesRead = (i + 1) * size;
        if(bytesRead > stats.size) {
           // When we reach the end of file, 
           // we have to calculate how many bytes were actually read
           end = size - (bytesRead - stats.size);
        }
        yield sharedBuffer.slice(0, end);
    }
}